Help locating gasket between alternator and vacuum pump on 2H/12HT

[tabascoloco]

I tried ordering both part numbers I found in the EPC, but only the older style that matches my old H alternator was available...so now I'm stuck with TWO new never opened alternators and vacuum pumps, but no gasket to put between. Here's picture of what I mean:

If anyone knows where I might get these, please post the information. I don't know if I can just take the larger ones somewhere and have this fitted/matched
or if its just a common size that I should be able to find somewhere. I have to get the aftermarket 80A off my truck...it makes my old 30 AMP gauge go crazy and I'm sure its going to mess something up eventually....I also don't like the way the aftermarket ones I've tried (I have 3 or 4 of them ...different brands) route the vacuum lines...on the one i have now, the oil line goes straight into my turbo hose....so I want to go back to the OEM one...I also don't even have anything that needs the extra amps anyway...no radio, nothing....so don't see the need for 80A anyway.

This is the part number I show for the "packing" / gasket / seal . I could not find it anywhere....I tried forklift supply houses, but they all had the larger one that I show in the picture only. Couldn't find this one.

 

[duncanrm]

Its not uncommon to cut and glue O-Rings when the exact size can't be found.

 

[TheBussman]

if you cant get it by part number try to get it by size, hydraulic shop, mcmastercarr or another.

 

[bj70bc]

ya cut it and fipg the whole thing, dont fully tight it down till cured, then tighten fully....
we wont tell anyone.....

 

[tabascoloco]

Seems it’s still available…I ordered several…apparently I ordered one of the internal ones for the older pumps which I also have so it worked out. The one that I needed apparently is the same from 74 thru 1990 .

 

[peacesells63]

Take it to a hydraulic shop, they will find the correct o ring in about 2 minutes and it will be about $2. If you want to measure yourself, order one from mcmaster carr as said above.