During my pre-Garrard times when I was using the Lenco L75, I used to source parts from Audio Creative Shop in The Netherlands. I would say that they are like the Classic Turntable Company with very high quality work. However I must mention that I have never used their international shipping as those were the times when I used to roam around in the EU, quite a lot. I must say that their idler wheel is of the highest quality. I was using it on my deck and it was dead silent and accurate. It was a bit expensive though, 50 Euros a piece in those times. When my L75 moved out, it went together with all its stock parts (including tonearm) and I retained the replacement ones including the new spring kit, v-blocks for the tonearm and gifted them to a very close FM friend.
Note: I am not a PTP fan and hence never took that route. Also, the unique aspect of the Lenco world is that it is so very customized with so many DIY options, there are so many out there doing such great stuff, that one would not really need to find a super-specialist parts or service provider. The options out there are many more, compared to Garrard.