All those bilsteins seem to be universal fit as the fitment is listed for 2.8 through to diesels..
There are brand new prefacelift oem front shocks on
ebay
https://www.ebay.co.uk/itm/184700043...YAAOSwKAJbPiBA
those along with original audi springs from tradition surely would be a much better fit? if you look up what colour dots are on your current springs chances are tradition will have them. I bought a set for new ones for my 2.8 6 months ago at around 170 euro each.