u/BeeThat9351

I have an FS90R that is used for my personal use. It is several years old and I like to have a stock of repairs parts for things that I will keep a while. Where would you suggest as a good source for a replacement carb to keep on hand? Stihl OEM only or is there an aftermarket source/brand that you like? Thanks, love the machine and want to be able to have no downtime and keep it a long time.