Hi Dwyne
Do you mean you're still in the UK now? My son graduated a month ago and we hired a gown for the day. The cost was £35. Or thereabouts. He did it over the net. He is at work at the moment but when he gets in tonight I will ask him what website it was.
Also, you could try Moss Bros hire. They do menswear and formal occasion hire. They are bound to have a website. My guess is it's
www.mossbros.co.uk
I'll get back to you in a few hours.
Bubbs.