PK:
The OEM rubber is my least favorite, but I still use it as a "shim" mat with the wool on top for exceedingly thin imports LP’s.
I prefer my DIY cork spot mat, but it’s fragile (paper base) and I’m on my 3rd effort @ this point.
This said, we have different decks and it would be better, IMO, to go with advice from those with a Rega, such as yours, in regard to mats/sonics.
As far a static goes I just nip it @ the source/cause and up the humidity, which offers numerous benefits in addition to the HiFi ones.
Too low humidity also has adverse affects on older furniture (we have a bed frame, a bentwood settee and a Tansu cabinet that are 100+ to 200+ years old in range that took a dive) and my wooden walking cane purchased new in 1973 also took a hit when I didn’t keep up on maintaining comfortable levels for 2-3 years.
I knew the drill having owned vintage Fender/Martin electric/acoustic guitars in the way past, but just got lazy/preoccupied with other stuff.
I’ve remedied most of the damage done to the bed frame and my cane, but the Tansu cabinet is only a little bit better with increased humidity (it has odd woods like pear wood, so further research is needed before I resort to using moisturizers and or glue/joint shims).
DeKay