Mercedes W123 series lowering kit

I'm fairly sure Spax make lowering springs and shocks, however there isn't going to be a massive reduction in height with those (depends what you're after though!)
Tonycocacola on here got his coil springs custom made, and it was surprisingly cheap IIRC. I think these are who he used.

Alternatively, you can use the free method of cutting off a few coils with an angle grinder.

A second set of stock springs would be cheaper to buy than some aftermarket lowering springs.

And 123's respond very well to chopped springs, you can get them fairly low but still sensible and they still ride very well.

I did mine with an off-the-shelf spring compressor.
Even TCC chopped his custom made ones lol

I have a full set of stock springs (and shocks) if you want them. Brand new, in boxes, completely untouched.

PM me if you're interested mate