Check out this guy's auctions. He has an OEM Speed Queen center post and agitator for [older?] washers.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7617116243&rd=1&sspagename=STRK:MEWA:IT&rd=1
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7617116243&rd=1&sspagename=STRK:MEWA:IT&rd=1
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