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I looked at this as well which has a pretty good rating - http://www.wiggle.co.uk/sram-pressfit-30-to-bsa-adapter/
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I looked at this
The only way to make PF30 even worse would be to go from the default thin plastic bushing to a thick plastic adapter. Well done SRAM, I didn't think anybody your size would have the balls to attempt the utterly pointless. If I wanted something that floppy trying (and failing) to keep my BB spindle parallel with my rear axle, I'd buy a Vitus 979.
Praxis Works seems to be well thought of, and looks to have been designed by people who actually gave the matter some thought.