I have 2 sets of bolt on spacers 25mm per side (4 spacers).
They are manufactured by delta mic and I bought locally. I've had had them on my car for a few miles before i changed to 30mm per side, and still look new and are tried and tested with no wobble.
Come with bolts to bolt to your original hub so you can re use your original bolt/ locking nuts.
After Â£50 pick up a pair ( eg one set) or Â£55 delivered. Can be picked up from Ipswich or Stevenage.