The 2020 Ford transit diesel 4x4's look adequate for a conversion. Should drive down the price of current sprinter 4x4's by some and the rwd high top transits by a lot.
other vans considered.
https://www.commercialtrucktrader.com/listing/2015-FORD-TRANSIT-5008428087https://www.commercialtrucktrader.com/listing/2015-FORD-TRANSIT+CONNECT-5007177555