@SueJB - If you do end up buying strips that aren't for your own meter, I would suggest buying one of the "big name" monitors, rather than something obscure.
In terms of strip interchangeability, strips from a manufacturer don't necessarily fit all their machines. I know this is certainly the case with Abbott strips.
When I had to buy strips overseas (after diagnosis - I had miscalculated how much I would be testing in 4 months!), the overseas pharmacies seemed to have Accu-chek, Abbott, and I think Contour. At the time, I was using iBGStar and couldn't source them until we went to Guadeloupe (which although in the Carib is actually French - very French).
Of course, I have absolutely no idea what might be on sale in Latvia, but in your shoes, I'd be looking to gamble if I needed to buy yet more strips whilst away, that'd there'd be a fair chance I could.
I hope you get something sorted.