You may try to get your space bar un-warped. It should be heated with hot water or a hair blower, then mechanically put force to bend it back to its straight position, normally by hand, and by progressive approximation.
One source for a 6.25u near white PBT space bar is to get a
PBT set from Bang Good for ~$18 USD.
QTan store had a white PBT space bar but I just checked and it is not there anymore, you may check with QTan its availability though. I am typing with one of them right now, along with my Skull Squadron set.
I hope this may be of help.
Errata: I wrote 6.5 instead of 6.25 sorry.