I can help here as been through this lots.
Even the originals can suffer from white worm. I ended up treating mine with a similar finish to RR's (except they were painted not powder coated)
I had rep monzas previously, they look ok with an excellent finish, but the width and offset is more in line with Audi alloys and they poke out a little further from the arch. This is more noticable on the fronts.
Reps are typically 8x18'' ET45 Hence why they stick out a little further. google search wheel offset calculator if you want to know exactly how much.
Originals are 7,5x18 ET51
I ended up replacing them with good second hand originals.
depends on your budget i guess. you could get reps and tyres for £450, or buy second hand and refinish as funds allow.
If I were there again, I would try to sort a deal with Robin. His are freshly re-furbed looking at the pics. Powder coated is best option to avoid the worm whilst maintaining 90% of the looks. IMHO.
Good luck.