I have 4 of them sat in my spares box gathering dust, won't be used as i run my cars in different configuration so they are obselete to me...
PM me an offer if you are interested
You can probably find a few more putting a post in the wanted section... will save a lot of hassle trying to get them made!
Other than that it would be far cheaper to have some similar shaped carbon LiPo retainers made than to try and get some injection moulded.