Look on ebay. Search other countries. You can get 18" new from states cheap. Ship via eBay global parcel service
just sold one yesterday to a chap on a course. Was asked if i had one spare so i said "make me a offer" Baragin as let it go for £25 quid due to i have a fair few of them on shelf that is over flowing. The chap was well surprised when i took his " take the pee offer" , bargain of the century for him ! Got a couple of mitre chop saws im getting shut of also. Best offer takes them. Someone on next course is going to get another bargain.
Ok then, pick them up when your next with us Mario, ones a Dewalt 305mm blade size and the other a sliding one which does a massive cut. Guess around 50cm wide cut. Will put them on one side for you. Bring your £2 quid along.