Maas is sold in the UK at Lakeland stores amongst others, but if you can't find it then Autosol from Halfords works too.

I think this is going to be one of those times where you buy cheap and buy twice as I'm fairly sure your razor will be poor quality and not worth trying to shave with. Read the wiki here, learn as much as you can by watching Youtube videos and browsing these forums, then buy a shave ready vintage razor from the classifieds here. You'll be thankful you did in the long run.