2m 300ohm or 450ohm ladder cable (Farnham GU9)

Hello peeps, I'm hoping someone nearby can help with this rather specialised request - I'm looking for about 2m of 300 or 450 ohm ladder cable to make a diy Slim Jim with (even better would be a Slim Jim for 2m & 70cm - but that would be an unreasonably big ask!). Thanks in advance, Michelle (G7MRB)