Hey folks, this is my first post here.
I just found a few threads about metric PC guide bushes which are all from at least a few years ago, with no new ones as far as I can see.
After searching the UK web for a couple of days for some PC-style guide bushes to fit my Bosch POF1400 ACE, with the RA1100 adapter I've also just bought for it on eBay (nobody sells it directly here in UK, and Amazon US & CAN won't ship outside their borders, grrr!), I found that Axminster Tools here in the UK make & sell their own PC-style metric threaded guide bush set (under their UJK Technology brand).
The set includes 10, 12, 14, 16, 18, 20, 24 & 30mm guide bushes plus a locking ring, all in a nice looking storage case, with a full dimensional drawing in the lid for each guide.
I can't link the URL directly but it's here:
It's £31.96 inc. VAT plus £1 for postage to me in London, so I'll update back here once I've received it in a few days.
They do also post worldwide but you'd need to enquire as to the rates outside the EU.