I have a Sheaffer 300 with crome trim. It's have a nice nib, smooth writter but i'm not happy with crome cap and plastic material of section. I think cap's base material is copper or smtg similar, easily lose form if gets a impact on tip. Not a good choice for a everyday writter which some accidents unavoidable. Anyway could you suggest me a website to find spare parts for Sheaffer 300? Like cap and nib ? Regards Ahmet