I hadn't seen this posted before so wanted to share what seems like a good find. I was looking for replacement ball joint dust boots for my control arms. One boot had split and I didn't want the expense of replacing the arms when the joints were still perfectly fine and I didn't like the bright-red replacement boots from BMP Design. The source (link below) I found via a Mercedes Benz forum is in the UK, but even with shipping, these boots are about the same cost as the ones from BMP Design. The nice thing about these is they look like the originals, so may be good if you're trying to keep the factory look and don't want to replace your control arms just because you have a torn or split dust boot. I just ordered a pair of Boot4, which are supposed to be a perfect fit for E30 control arm ball joints, and will report back how they work out after I receive them.
I have no affiliation.
I have no affiliation.