It would be far simpler, and cheaper to just buy the whole setup and replace it all. The trouble with this is if the punter has the tools and capability to actually do it, the actual parts are not too expensive.
What people are doing replacing their wet-belt with another, new wet-belt, instead of a chain, has got to be one of the most retarded things to ever occur in human history. If they are going to go to the trouble why, oh why, don't they put a chain back in and eliminate the death-wish, wet-belt.
Seriously, it isn't that difficult to do, but you do need a fair few tools.
When I did mine, I had the actual timing case start weeping water so I had to strip it back to the engine block so as to refit a new gasket. This was unforseen and caused problems as I had to stop and order a new gasket. I don't know if this is a common occurance though, or just something that happened to me.
I would do this rather than try and source, and fit a new motor.
https://www.ebay.co.uk/itm/TRANSIT-CONN ... SwjjdeQpan