try robinsons-uk.com

they have an agility section

and have poles/cones tyres quite cheap tbh!!!

as for the shop link you posted - i think thats rather expensive! we use poles bought froma show a few yers ago and jus tstick pegs on them and poles from robinsons!!! cost me less than £20 for 4 jumps i think!

try some stakes in the garden - pegs and poles from eithe rrobinsons like i said or somewhere else....

btw our poles are blue and also double up as weabving poles (as our gardens not that big its either 2 jump n weaves or just jumps!