Wm Crum on the end of George Street in Glasgow. A proper old fashioned shop where the staff know exactly what they are doing.
I walked in on Christmas Eve two years ago with the burnt out element from my oven in a carrier bag.
In the time it took me to walk from the door to the counter, the lady had reached behind to the dizzying array of spares hung on the wall behind her and picked out the exact part I needed even though she could only see the shape of it through the carrier bag.
“Is this what you’re looking for?” – Gobsmacked. Christmas saved.
I’m not sure if they do online too, but they might be worth a call…
http://eshop.glasgowappliances.co.uk/