Just took apart and fixed the impeller in my V1 unit. I was able to "glue" it back together with epoxy putty...
https://www.amazon.ca/Oatey-31270-Tubes-Display-4-Ounce/dp/B07MKLMMTL/ref=sr_1_6?crid=3UM5BN2I537NB&dchild=1&keywords=oatey+fix+it+stick&qid=1614742942&sprefix=Oatley+fix%2Caps%2C217&sr=8-6
That stuff is amazing and has gotten me out of so many jambs! I bought this new impeller but it didn't fit...
https://www.amazon.ca/gp/product/B07RFD65Q5/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
The metal shaft it came with was too short and I couldn't use the original metal shaft because its diameter was too large and would not fit in the hole going through the centre of the impeller.
Anyway, the fix only took me an hour or so. The unit is on now and back to like new. Let's hope it lasts!