Jay Jay: £19.80 for your screen bolts in polished A4 stainless (ideal for gold plating), comes with all the rubber well-nuts and scratch-proof washers as well.
Newnut: Had a look for engine covers, nothing for your year of Blade unfortunately, but the regular bungs are available:
£66.67 if you want to go for them, I'm offering free crash protection fitting for WB as well if you buy them through me.