IXBT REPORTS, based on overclockers.ru, that it"s possible to perform modifications to the Radeon 9500 to turn it into a Radeon 9700.
There"s Russian text and some diagrams about this claim, here .
If your Russian is a tad rusty, there"s a part translation from iXBT over at VR-Zone.
We can"t vouch for whether this all works or not, and it looks like you might have to be a tad nifty with the old soldering iron.
One reader ponders whether such a conversion, anyway, would do much more than enable the other four pipelines, but the 9500 only has half the memory bandwidth of the 9700 Pro.
And there"s a full translation of the lot, at Digit-Life.