Dudes if you give SP a call they still stock shocker lube?
You dont have to buy an oring kit last time I checked (I placed an order with them about 3 weeks ago) The new lube on the SP site is manufactured by Dow Corning who also by chance produce DOW33 (funny that with a name like theirs). The new stuff (Sleek) does exactly the same as 33 as its still a silicone based lube apparently.
It can be bought seperately though for sure...
http://www.smartparts.com/Store/default.aspx?Prod={BF4CAB86-5D68-4D80-A8C2-5F2B80A29281}
Hope this helps.