When I last looked the stalks, lights and wipers, appeared to becoming scarce particularly wiper ones with price rising accordingly. Having used my spare light stalk I managed to secure a pair on eBay for under £100. I did wonder if sources would eventually dry up but a check just now reveals my bookmarked stalks are still available.
Light/indicator stalk.
Wiper stalk or
both noting that the latter are still available for £99.99.
Regarding quality of replacements I have no reason to believe then are any worse than the original ones fitted by MMC if indeed they are not since they all came in Lucas box's. Certainly no mention of Britpart which in any case I have no serious gripes with given my Land Rover experience.