Apologies in advance if this is in the wrong pigeon hole - there were too many to sift through and [Classifieds] returned an error '...not allowed to post here'

So, here we are -
Rectifying 'Spares & Repairs' locos and returning them to the community is a satisfying pursuit BUT (yes, it can be a BIG 'but'), some casualties showing up at the clinic require more than a mere soldering iron or replacement tyres/motor.

 

As the topic title suggests, I have an acute shortage of Minitrix parts -
Eccentric crank pins and some readers will know this part intimately - has a square pin by which it fits into the main drive wheel.
The 'cross-piece' rod slider.
Hex-headed 2mm bolt for connecting rods to wheels (Perhaps a dozen of these).  Has anyone used the 'push-fit' equivalent seen on ebay?  What were the results/reliability?

 

Items [1] and [2] along with along with a couple other spares for the Rivarossi Y6B (Which I could also do with) were advertised on Shapeways but (yes, another 'but') my messages and later on direct e-mails to that seller/creator went unanswered.  Over the next few months, I would re-send the enquiries until alas, several months elapse and Shapeways folded (I can't imagine why) and again, sending to the creator's own contact e-mail met the all too familiar silence.  So, I'm by no means lazy, just lacking up-to-date info.

 
Anyway, I was wondering if anyone (else) has created their own stockpile of 3D printed parts or knows where there are/is a reliable source of 'originals'.  I'm in the market for half a dozen of each of the above-mentioned Minitrix parts - having a Britannia and a 9F wanting the cross slider and a blue A4 - 'SNG' awaiting some bits.  Doubtless I'll need more in the future so, may as well 'stock up'.


Thanks in advance for info and apologies for the Daveja vu experienced by readers of RMWeb - a response therein kindly suggested that I post here.

TIA,
Dave