2012 Sprinter engine recommendations

[DangerousDerek]

The engine in my Sprinter let go with a suspected spun bearing and a nasty knock. Ive had it removed from the van but am struggling to find somewhere I can trust to take it on.
I am happy to pay for a full rebuild and hopefully some peace of mind for at least a few years driving.
I am based in Cumbria but willing to travel to the right place to sort it.

Any recommendations greatly appreciated thank you.