Bit late I know, but you can get the plug kits from most small motorbike spares shops, for about £20. Metzeler kits come with three plugs and co2 bottles, Tip Top do one with ten plugs but not enough cement for ten.(4 or 5 tops) I treat both as permanent repairs. The tyre weld I would use as a last resort only - it's only temporary and really messy, so the tyre people hate you for using it.