You'd need to go either 140 or 150 on the rear.
150/70-17 is the nearest fitted circumference to the 130 stock.
The 140 ends up being considerably larger
There's quite a few threads re tyres........
This may help you:
Stock Front: 100/90 18 18 x 2.5"
Avon Storm ST AV55
110/80ZR18 58W **Circumference compared to stock -0.6%
Michelin Pilot Road2
110/80ZR18 **Circumference compared to stock -0.6%
------------------------------------------------
Stock Rear: 130/80 R 17 17 x 3.5"
Avon Azaro Sport Touring AV46-ST
140/80ZR17 (69W) **Circumference compared to stock +2.5%
Michelin Pilot Road2
150/70ZR17 **Circumference compared to stock +0.3%
Likely all 150/70-17 tyres will be pretty similar, not sure what is in the Avon range in that size.
Also note that Michelin seems to be the only manufacturer showing their 150 series fitting to a 3.5" rim.
Go here
http://www.miata.net/garage/tirecalc.html and use the lower part of the page to compare all the real dimensions.
I can't recommend the Road 2 Dual Compound tyres highly enough, I've done 4700km on them now. Absolutely no centre wear, but the soft side compound is getting a hiding and doing its job. I've taken the peg scrapers off and, this last Sunday managed to scrape the shifter [unintentionally]
PM me with your email address if you like and I'll send you a list I've compiled of options