Oh goodness, I thought I had set email alerts if anyone replied to this thread, assumed no one had replied and then I come along and find 22 very high quality replies with great ideas, debate, and nuance! Thanks everyone who posted! I have read each reply carefully. Good points on all sides.
I think I am going to keep an eye out for a good deal on fish-scale or the more modern short-skin-capable skis.
To those who say "get both" I am trying to avoid this dangerous path!
I've seen some of the ski/boot collections on here..!!
If nothing comes up (there is a very limited used market for this type of skiing in UK) I will try my luck at wax following your advice and also investigate the 'Madshus Intelligrip' or 'Black Diamond Glidelite Mix Kicker Skins' which seem like they could fill in the gap a bit. I do not want to get sucked into wax-geekery though, I saw someone on fjellforum.no mention that skiwax chat was forbidden at their dinner table which I thought was rather amusing.
Brexit and Corona may well sink the trip but flights are around USD 85 return just now and I need something to plan so I'm blindly going for it.
I'll let you know how things go and thanks again for the pointers!!