Is it impossible to order these online for a sensible price?

I can get an instant quite for new uPVC windows, any size almost any type
with ease.

I just want a reasonably priced supplier for DG units to fix some existing
frames.

Been round the local glaziers - all coming up with what seem fairly high
prices of around 130 quid per square meter for 12mm gap 4+4mm toughened
glass, low-e.

Anyone got a web address of a DG sealed unit supplier?

Cheers

Tim