For the time being, try to find a cheap SD2IEC unit for sale online. This can let you download any program or .D64 disk image from the 'net and load it from a virtual disk. For games that don't load from SD2IEC (because of fastloaders or copy protection), well, use the real disk drive you have.
You're lucky to have a PAL model. Most action games & scene demos target PAL machines.
Oh, and try to find an EPYX fastloader cart ASAP (if your C64 doesn't have a fast load cart/JiffyDOS ROM already); it'll preserve your sanity as the C64 disk data rate is glacial...