Ranger focuser-broken screws

I have an old Ranger that I use hard for birding.
today the slide focuser tube rotated and came all the way out!
It looks like two allen screws engaged a slot/groove in the bottom of the tube to prevent it from rotating or backing all the way out. Apparently (there was not much left), two tiny brass pins that were mounted in these steel screws wore off.

Where can I get replacements or does this have to go back to Al?

Glen; In taking my Ranger apart there were three allen head screws. Two tiny ones hold the retaining ring at the back of the rubber-ringed focuser and one larger one that is mounted in the internal focus tube.

In your shoes I would call Televue; at most they'd need to ship you the retaining ring and two tiny allen head screws, and maybe its only that larger allen head screw you need. Either way I would not expect it to be very expensive and think it is something you can fix yourself without sending the scope back to Televue.