Try CPC.co.uk. (aka Farnell)

I oredered some bits for a Hotpoint washing machine yesterday. Ordered
at 11:10 for Standard delivery (2 - 5 days). Arrived today at 2:45
p.m.. About half the price of my local 'Domestic Appliance Spares and
Repairs' shop. It all looks to be good quality.

Dunno if they do dishwasher bits.