I don't know what size you're looking for, but I have bought from this seller before, and it's always been good stuff.
I'm pretty sure he has stock that isn't up on his eBay shop, so if what you're looking for isn't presently for sale, it might be well worth messaging him.
I've bought everything from lab bottles to test tubes, these little ones I use for spices in my camp kit...though the ones I got from him had screw on caps.
Those Survival Resources ones are about 85mm long but only 6mm internal diameter - if you can use something wider bore there are scores of suppliers on amazon selling plastic test tubes and plastic vials for pence (£7.99 for 50 for example).
Had another thought lastnight ''it does happen sometimes'' Try using the Nozzle / spray Tube from Expandy Foam or similar product's it's a expensive option but the size would be better and ask around people keep spares.