Yet another doorway question...

Having looked into my doorway arch problem, I have decided to add an
arch such as the one shown in the link below:

http://www.plastermouldingsonline.co...58&p rice=584

These are a few of these already in my house, which teh previous
owners fitted, so it would be in keeping with the style. However, I
would like the arch and the pillars which go all teh way to the
floor...

My problem is that I am struggling to find companies to get prices etc
from. Obviously I found the company in the link above and one other
called regency mouldings (who I cant get hold of), but in teh
interests of shopping around I woudl really lie several more companies
so I cna compare styles and prices...

Does anyone knwo of any such companies?

Thanks for yuor help.. again!

Tom