Yep - I started a thread on this a couple of years ago (Dodgy Pipe) - Peter Smiths replaced mine for the second time earlier this year - both of them - at Lotus expense - although only the smaller diameter one had broken.
The first time it was still under warranty and it was replaced with what appeared to be an identical pipe. However the second time (when out of warranty) they were replaced by what appears to be some sort of strong rubber pipes (may be metal underneath - I don’t know). Hopefully these will allow a bit of flex.
Incidentally - I don’t know if they had to whip the cam cover off to access them - but a few weeks ago I started to get an awful burning oil smell with the windows down - couldn’t trace it at all until I tried tightening up the cam cover bolts. This had the effect of making the leak much worse! - but at least I could tell where the oil was leaking from! Fitted a new gasket last night and torqued the bolts up in the correct sequence - test drive due tonight.
Cheers, Tim