I have long bemoaned the increasing paucity of decent tyres in sizes of interest to owners of old beasties. Continental have just carried out a massive expansion of size availability & now carry a host of relevant sizes in very good tyre types. Have a browse through the EcoContact 3 & 5 & PremiumContact 2 & 5 listings.
175/70-13 (& 155/80 if you insist) in EC3 (R12, R17)
175/65-13 in EC3 (R12 & R17 with 5" + rims)
175/80-14 in EC3 (R20)
175/70-14 in PC2 & EC5 (R16)
165/65-15 in EC3 (4.5" rim R10S & R8G & Citroen GS)
Oh & and for anyone with a new critter using 19"+ wheels, the class-leading Conti SportContact6 (replacing the SportContact5P) is now (& very swiftly) released in Oz.
&, to my personal joy & delight, given my enthusiasm for 14" wheels on rear-engined Renaults and my dismay concerning the dubious merits of the denizens of the small pool of Oz-available 185/60-14 tyres (Bridgestone's T001 & Pirelli's P1 are the none too satisfactory best of a bad bunch), the splendid PC5 is now finally released here in that size. Even better is that it's also available in my front tyre size of 165/70-14, so I can be sure of structural match for front/rear balance (which has been an issue with existing PC2 fronts & structurally sloppier & more tread unstable T001 or P1).
Have a browse in your tyre size as there is also a "4 for the price of 3" deal going until the end of June. (I have availed myself of it for 4 PC5 tyres for a daughter's Corolla - replacing the near-new "Pace" brand rubbish which was gripless in the wet.)
These will all be tubeless but, as I have written about before, can be fitted without technical objection to our "tube-type" rims without concern. (Do maintain pressures above 15 psi though.) Don't be tempted to put in tubes. Nothing will be gained & you'll risk tube failure. I will reproduce my past discussion of this issue upon request.
Sometimes the Gods smile anew on owners of old Frog stuff.