Grouping and numbering in XSLT 2.0,

I have an XML report like the one below. I want to group vendor-data by
vendor. I have no number to use as grouping key, but as you can
understand each vendor has one name, one cage etc. The result I want is
listed at the end.

If I could assign a sequential number to each <value> within each
<cell>, and then use this number as grouping key, I believe the problem
can be solved.
I cant just figure out how to this in one XSLT style sheet.

Source list:
<?xml version="1.0" encoding="UTF-8"?>
<vendors>
   <cell name="Company">
     <value>AMPHENOL AEROSPACE OPERATIONS</value>
     <value>ITT CANNON</value>
     <value>SOURIAU CONNECTION TECHNOLOGY (FCI)</value>
     <value>DEUTSCH ECD</value>
     <value>AERO ELECTRIC CONNECTOR INC</value>
     <value>AMPHENOL CORPORATION</value>
     <value>TEC ELECTRICAL COMPONENTS LTD</value>
   </cell>
   <cell name="Cage">
     <value>77820</value>
     <value>71468</value>
     <value>F0225</value>
     <value>11139</value>
     <value>59976</value>
     <value>74868</value>
     <value>K0690</value>
   </cell>
   <cell name="Address">
     <value/>
     <value/>
     <value/>
     <value/>
     <value>TORRANCE</value>
     <value/>
     <value/>
   </cell>
 </vendors>


Preferred result:

<?xml version="1.0" encoding="UTF-8"?>
<Vendors>
   <vendor>
      <cell name="Company">
            <value>AMPHENOL AEROSPACE OPERATIONS</value>
      </cell>
      <cell name="Cage">
            <value>77820</value>
      </cell>
      <cell name="Address">
            <value/>
      </cell>
   </vendor>
   <vendor>
      <cell name="Company">
            <value>ITT CANNON</value>
      </cell>
      <cell name="Cage">
            <value>71468</value>
      </cell>
      <cell name="Address">
            <value/>
      </cell>
  </vendor>
  <vendor>
      <cell name="Company">
            <value>SOURIAU CONNECTION TECHNOLOGY (FCI)</value>
      </cell>
      <cell name="Cage">
            <value>F0225</value>
      </cell>
      <cell name="Address">
            <value/>
      </cell>
  </vendor>
  <vendor>
      <cell name="Company">
            <value>DEUTSCH ECD</value>
      </cell>
      <cell name="Cage">
            <value>11139</value>
      </cell>
      <cell name="Address">
            <value/>
      </cell>
  </vendor>
  <vendor>
      <cell name="Company">
            <value>AERO ELECTRIC CONNECTOR INC</value>
      </cell>
      <cell name="Cage">
            <value>59976</value>
      </cell>
      <cell name="Address">
            <value>TORRANCE</value>
      </cell>
  </vendor>
  <vendor>
      <cell name="Company">
            <value>AMPHENOL CORPORATION</value>
      </cell>
      <cell name="Cage">
            <value>74868</value>
      </cell>
      <cell name="Address">
            <value/>
      </cell>
   </vendor>
   <vendor>
      <cell name="Company">
            <value>TEC ELECTRICAL COMPONENTS LTD</value>
      </cell>
      <cell name="Cage">
            <value>K0690</value>
      </cell>
      <cell name="Address">
            <value/>
      </cell>
   </vendor>
</Vendors>


Regards Geirr