Carguy, some longitudinal manual transmissions in no particular order:
-
Renault (several), good to about 250 HP stock. Europa people upgrade to a different Renault box. I think they buy them pretty cheap on eBay.
*Citroen (best avoided, crown and pinion gears are now made from Unobtainium)
*The Audi's you spoke of
*Por$sche
*VW
*Subaru (I've "heard" you can close off the rear drive section of an AWD and use it to just drive 2 wheels) There might also be some FWD only Subi stuff out there.
Then there's the race stuff, Hewland, dog boxes, etc. Light weight and reliable don't mix very well with transmissions. Or, let's say: "Reliable, Cheap, Light weight: Pick two."
Transverse mounting opens up a lot of possibilities and will likely fit just fine for a MidCost.