They use an odball fan element for most things that I’ve not yet been able to suss out an alternative for, I’m sure there is one, I’ve just not found it as yet. 😕
Teka/Kuppersbusch Craig can get you spares for no problem, but they aren’t the best by a long way. We often get incorrect spares and long delays are not at all uncommon.
From memory fan elements were about the £20-£30 mark.