Anywhere to obtain bolt together spacers for QHY camera / FW

[teoria_del_big_bang]

Is there anywhere in UK or Europe to get these type of spacers, more in the 0.5 mm and 1 mm sizes to tune in the BF.
Like these:

QHY have started marketing sets like above but not seen anywhere they are on sale yet and besides they are expensive as they are all sold in sets so prices seem to be from 40 to 140 USD, so if like most stuff will be similar in GBP for us in UK. That seem a lot to pay if you only need the 1 and 0.5 mm ones.

Steve