First, please note that I have this from when I put a spare on the Nissan Leaf. 

At the wrecking yard, I'm confident you could get them for $10, virtually unused. The Nissan Altima 2002-2006 spare wheel (rim) part number from any USA Nissan dealership:
40300-L31010. Should be 66.1mm center hub diameter.
$184

Bolt pattern 5x114.3 mm. Note from me: Sometimes the bolt pattern may be in English measure, which is 5x4.5 inches.

The Rav4 wheel center bore diameter 60.1mm, so, obviously a 66.1mm Nissan wheel will fit. The reverse wouldn't be true.

If you see any internet list the bore diameter as 67.1mm, it is wrong. 

The standard wheel offset is +45mm.

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The best wheel to get is the 2006 and newer Toyota Camry wheel-17x4-Compact-Spare-Tire-Donut-T155-70-D17

"Hollander Parts is your online source for 2007 TOYOTA CAMRY WHEELS WHEEL 17X4 SPARE . Used wheels wheel 17x4 spare in A grade condition with 119,000 miles start around $35. Get your wheels wheel 17x4 spare shipped today!"


http://www.hollanderparts.com/used-auto ... 4--spare-/

http://www.ebay.com/itm/2008-Toyota-Cam ... fc&vxp=mtr