Any number of places to get Stainless rod, resin and fiittings but Screwfix is a one stop shop.
As you've already sourced the rod locally if you can't find the resin in the local builders merchant I'd substitute a 7 minute polyurethane. If a whole tube is too much to pay for your local woodwork or model shop will sell it in small bottles. "Gorilla" is the most common brand in that smaller size. Longer setting time though.
Caution - the glue expands to fill any available airspace so underglue by 30% and wear gloves - it's a bugger to get off. Any excess can be trimmed or popped off with a chisel while 'green' - solid but not truly set.
Rob