I don't know what exactly you mean by "timing kit"
I think you have to get all parts individually (idler, w pump, t belt etc) Careful with the waterpumps bc there are junk-quality brands out there. Try to find the good one. Tons of write-ups available on this Forum but I have no time to run the forum search right now.
About the thermostat.
I think I'll order this one and redo my cooling system for the Summer because it looks just like the 87Celsius WÄHLER thermostat that I recently installed but this one is the 80°C version. The 87degree version is fine btw and very safe to use (no issues with it for years but coming Summer I simply wanted a system checkup and a new unit)
https://rover.ebay.com/rover/0/0/0?m...2F123005152200