All u13 bluebird/altima for our local market come with sr20 engine. Have you tried out asking in nismoclub forum? or perhaps motortrader? Saw few U13s for sale a couple of issues ago. Or try AW.
Was about to change tires for my LGT (Fwd) ... Currently using Potenza RE050 ... Good tires but wears off quick ... I will be replacing the front first due to budget constraint.