I didn't think about that. The rod is aboue 1.4-1.5mm in diameter so I searched for that.
Maybe with one of these I can make a few https://www.amazon.com/Round-Brass-Rod-Diameter-Engineering/dp/B01C6LUO5Q/ref=pd_sbs_2?pd_rd_w=oOixO&pf_rd_p=c52600a3-624a-4791-b4c4-3b112e19fbbc&pf_rd_r=FGTT30Z03ZP4VM8RNBJ7&pd_rd_r=bcc9c114-31e5-411e-9653-782de74d8936&pd_rd_wg=PJ...
Thanks for the idea.
1.5mm
Can be found here if you're in the US
I bought these brass rods: https://www.amazon.com/gp/product/B01C6LUO5Q
and I bent the end of one to use as a handle and the other end I push down from the top of the extruder and everything comes out the hot end (make sure it's heated up).