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I cut and pasted from Mousesavers.com. This might be what you're looking for but the site has other possibilities.
7 Days for the Price of 2 Offer
MouseSavers.com reader Carrie S found what looks to be a great deal on Universal tickets. Get 7 days for the price of 2! This is a "Stay and Play Pass" good for 7 consecutive days from the date of first use to Universal Studios Florida, Universal's Islands of Adventure, and Universal CityWalk.
The price is $99.95 for adults and $89.95 for kids (ages 3-9). This price includes tax, so these would actually be slightly cheaper than a 2-Day/2-Park pass.
The offer appears on RCICommunity.com, which is a major timeshare owners' web site. Carrie reports that she was able to order these tickets through the site with no problem. There is a space on the order form for "RCI Member ID" but it isn't a required field. Note that the tickets are not shipped to you; you must pick them up at a Guest Services window at the theme parks when you arrive. Carrie reports that she only had to show a photo ID to pick up the pass, and was not required to show RCI membership.