Not so sure. They have been made to fit in an OE car not a copy of OE links. They have larger uprated ball joints so are chunkier. This is ok on an OE ARB but think issue is the eibach ARB had a different clearance between hole and when arb goes thicker as it moves away from mounting point so the larger ball joint touches the ARB.
I am sure I have seen it said on here they do not fit eibach ARB's but can't find it now.
At £30 I'd say buy a set and have a look, if they don't fit then punt them for not a lot or loss if you take £5 off to get a quick sale.