Ally rod ends / rose joints

[Hog]

Wasn't quite sure where to post this so here goes:

I need to make up some tie rods for a Mardave racer. Need to be approx 50mm between ball centres. I'm looking for aluminium rose joint ends rather than the plastic pop on (and in my case - pop off) variety and left and right hand thread for ease of adjustment.

Looked on the bay without much luck (other than cheap Chinese stuff) - anyone got any ideas to help? Possibly helicopter stuff as I know they tend to use rose joints - shortening the rods isn't a problem.

Thanks in advance.