Griot's Garage sells low-profile ramps w/ extensions:

http://www.griotsgarage.com/catalog.jsp?L1=L1_3000&L2=L2_3030

If the link doesn't work, they're foud under "Prepare Your Garage" and then
"Lifting/Jacks/Stands."
Listed @ $54.95/set.

-Jason

I had the Rhino ramps and ran into the same problem you did.  I'm using the
metal ramps and extensions available from Griot's Garage
(http://www.griotsgarage.com/catalog.jsp?&SKU=10142).  The Euro spoiler just
barely touches and I'm running H&R sport springs.  If you're running H&R
race and a stock spoiler I'd think they'd probably work for you.

I tried various tricks with wood and my Rhino ramps and just never felt
comfortable with it.  I eventually found the ramps at Griot's.  There's
nothing particularly special about them so they're probably available
elsewhere for less, but I'm not sure where.

Later,

Luke