Can't find a big enough heating pad, help!

[Rubytalon]

I m looking for a heating pad that's big enough for a 120 gallon/roughly 23x48 inch tank, any rcs? I can't seem too find any in the local stores (I've herd that it should cover 1/3 of the tank, can't seem to find hanging big enough for that)

It's for a two year old corn snake someone gave to my family, he is using a heat lamp he came with for now

^^

[toddnbecka]

Ultratherm Heat Pads