I've once or twice got a pair of well darned and reholed holed long woollen wellie socks before now and cut the foot off , carefully picked back till I can get a full run through without breaks , over stitched it all with wool and then sewn the finger and thumb holes in .
My lass called them my " tramps gloves" but as they were well up past my forearms I wasn't bothered .
I never got on with the partial finger glove for some strange reason , suppose it was that the finger bit always got pushed back into the joint and as my hand curled round handles it made lifting things a bit difficult.