Will A6 Lemans 19' Alloys Fit B8?

Guys, new to the forum having just acquired an 09 plate A4 Tdi Quattro. All 4 wheels are kerbed, 1 with quite a chunk off it, they are 19' OEM RS4/LeMans rims with 255/35/19 rubber. I'm trying to source 1 individual rim with a view to refurbing all 4 if necessary. I've seen a set of same diameter A6 LeMans rims but do they fit? My understanding is they have a different offset and centre bore? These are refurbed already and are sitting on fresh Pzero's on 2 of the rims and rim only on the others with a price of £700 which seems fair enough. Didn't want to buy without good advice.

The B8 has 66.6mm centre spigot diameter which is larger than previous A4's, I'd guess the current A6 is the same but the previous generation will be 57mm. So it depends what A6 they came off.