I found radusa impossible to deal with unless you know the exact size you need. Forget asking them to know specs between different OE wheels etc. In other words you have to get everything else first then physically measure, then order from them.
Personally I need 41-42mm shank but my personal needs were not what I intended the thread for.
Often EPC does not give parts specs like the bolt tread or diameter or length info but for wheel bolts it actually quite often does.
For example, the part A2034010270 for a light alloy wheel: M12x1.5x40 mm. This has been used on a 170, 124, 129, 168, 208, 210, 209 and a 171.
The part number A0009904507: M12x1.5x21, used on a 168, 414, 170, 203 and 210.
The part number A0009904907: M14x1.5x21, used on a 212, 199, 204, 218, 164, 207, 251, 169, 245, 211, 209 and 230.
Perhaps a complete list would be useful.