Hello, friends.
Apologies in advance for my unfamiliarity with fountain pen lingo.
For many years, my favorite pen has been a Parafernalia Woodstock Briarwood pen:


As you can see from the picture above, the pen is threaded at both ends, and the cap can screw onto the nib when not in use or onto the other end of the pen when in use.
Unfortunately, the threads on the nib assembly (not sure if that's the right term -- the part that holds the nib and screws into the shaft (?) of the pen, pictured below) have worn down, and the cap no longer screws onto the nib. The threaded piece that screws into the shaft also is wearing down, and actually crumbling:


Anyway, I can't afford to buy a new one so my question is -- does anyone know where I might be able to get a replacement of just this piece?
Thanks in advance,
Michael
Apologies in advance for my unfamiliarity with fountain pen lingo.

For many years, my favorite pen has been a Parafernalia Woodstock Briarwood pen:


As you can see from the picture above, the pen is threaded at both ends, and the cap can screw onto the nib when not in use or onto the other end of the pen when in use.
Unfortunately, the threads on the nib assembly (not sure if that's the right term -- the part that holds the nib and screws into the shaft (?) of the pen, pictured below) have worn down, and the cap no longer screws onto the nib. The threaded piece that screws into the shaft also is wearing down, and actually crumbling:


Anyway, I can't afford to buy a new one so my question is -- does anyone know where I might be able to get a replacement of just this piece?
Thanks in advance,
Michael