Finding tyres for original 16" wheels?

[S3THUNDER]

I'm a newbie to Cerbera ownership and absolutely loving it!!I'm having trouble finding tyres for my 4.2 cerbera. I can only find Toyos, which have a W speed rating. It's currently on old Bridgestones that are Y rated. They look as good as new,but are about 7 years old,so I'm concerned how well they will stick to the road. I'm not planning to be frequently doing 185mph,but don't want to be worrying about them blowing! My question is, am I better off having y rated tyres that are of different brands or going for Toyos all round?

[Gazzab]

Assuming there are no other choices I'd go for toyos.

[Gazzab]

Or put some 17 inch RLs on with wider choice of tyres?

[S3THUNDER]

Hi,I thought about 17" wheels,but they seem almost as rare as tyres for 16" wheels.