slipyoke

im looking to get a d/s cut this week..id like to have a slipyoke in my hands so i can test fit it and make sure im happy with it before i take it all to get cut and assembled. if some one has a part number for a slip for a " A body 833 four speed preferably spicer or neapco,it would be really helpful..and where can i order one..any and all help is highly appreciated..tx..j