Help with cool tube needed!

So my newly bought, second-hand cool tube arrived in the post today, to be the crowning glory in my chili grow room...The glass was completely smashed; I was gutted.

I refuse to pay £50+ for a 125mm cool tube, and thus need some suggestions as to alternatives. I would prefer to build my own cool tube, but here in the UK, the Bake-a-rounds are nowhere to be seen here. Hurricane lamp fittings are never wide enough either.

Can anyone in the UK (and the rest of the world, of course) help me out here?

Thanks for any advice...Grrrr, damn courier service.

eBay...its just that simple. Im sure you could find someone to ship you a bake-a-round. and if you already have the light socket, your good to grow. I bought an 8" cool tube for $80 USD on eBay. Make sure you pay through PayPal incase you have any issues like broken merchandise. You will get reimbursed quickly.