Series 3 V8 gearbox struggle

I’ve recently purchased A sd1 v8 thinking there would be a conversion plate available still. Ive failed to find one second hand and nobody makes them new anymore. Ive looked into mating a LT77 gearbox but coupled with high cost of v8 bellhousings and then the need for the Ashcroft kit to keep the 2wd it all get very expensive. Does anyone have a conversion plate spare or a v8 bellhousing