That was my intension, but my friend who is the hobbist machinist hasn't gotten back to me, so as it stands, it looks as though I might be literally custom making the main gear retract units myself for the first one.
As for the possible other copies, I hope to keep the design so I can use as many off the shelf parts as pissible. Time will tell......
I found this on YouTube, fairly simple, not to many parts,
https://youtu.be/K0h7pq3oxM8