I'm a Bikeability instructor and fortunately we've been able to start up again in a small number of local schools. A usual problem we have during M checks is missing bar end plugs, so I'm looking to purchase a qty of cheap, plastic plugs that we can just quickly whack in to the handlebars and not worry about asking parents to get it fixed. Anyone know the best place to source something like this in a reasonable qty, maybe 50 pairs to start with? Will eBay likely be the best place? Any suggestions welcome! Thanks..

See if these have got anything suitable. The won't be bike specific but if they're the correct size that won't matter.
https://www.bpfonline.co.uk/search.asp?catid=2991

Nice one, thanks Stuart

Ison Distribution used to do a workshop jar with about 50 plugs in them. IIRC cost (to trade) was about 30p each. Don't think they'll supply direct to consumer but if it's for Bikeability, it might be worth giving them a call.

edit: https://www.ison-distribution.com/engli ... t=HGFIBP1K

£10 for 100. AliExpress could take a month to arrive though
https://a.aliexpress.com/_A2mJpZ

thanks steve and jamie - i'll look in to both