Welcome to the EMGS.
Alan Gibson does a conversion pack (4800/5 on page 27 of the catalogue). UltraScale also do a conversion pack, but more expensive. Not sure of turn round time for either sources
This particular pack is not currently part of the EMGS inventory so you will need to go direct to the suppliers
In terms of the conversion itself I haven’t had any experience of diesel conversions. Some of them are just straight replacement but others require some surgery to make room.
Hopefully someone on the forum will be able to help