cast iron man hole covers??? 20"x26" needed or replace with somthing else??

[broome]

strange one this,...i got home tonight & noticed the manhole cover was raised abit, closer inspection its cracked so its fooked,..[lucky the car didnt fall down as its rite next to the rear wheel!]..... it just seems an odd size 20"x26" & b&q dont sell em there all 450x600... any idea where i could get one or could i get some sort of thing made to cover the hole..... thanks broome...

[Cossie col]

Try travis Perkins mate, cover might be slightly different size but just by new cover and base and cement new base in place