Intel does not offer blowers through its replacement parts service, but they *are* standard parts and most are available though distributors. If you remove the blower, the hub label on the opposite side should have the part number. Simply do a search using this part number and you should get hits for the distributors who carry them. Note too that there are practically identical blowers from multiple manufacturers. The distributors can help you determine what alternate replacements are (also) available.
Hope this helps,