a 2.3L Ford C4 bell housing can be had, but for a price. they're rare. i recently found one for my possible 4bbl 2.3L build. i'm sure the trans cross-member & driveshaft will need modifications, as well as other modification.
also, the c4 is a 3 spd tho, so your gas mileage would be hurting.
easier to buy another a4ld or do a T5 swap.