Help Converting Old Ukranian Notes

I have a bunch of old Ukranian Hryvnia notes, apparently they have changed twice since I got these. Because they are old I cannot change them at the regular places to change foreign notes. I have tried finding a Ukranian bank in the UK that might accept them, but I cannot find one.

So, any chance there is someone out there who knows someone who might be going to/ back to Ukraine who might be able to change them for me???

Bit of a long shot I know.