Emulation is the easiest answer here, and in the case of ports, Ocarina's even been given a PC port that fixes some things like the original's poor frame rate. That said...
Honestly, your best bet is to go for a 3DS for better value. Both games are on it and go for decent prices anymore. We're getting to the point now where retro hardware is chancy to pick up due to sheer age, so if you want something that will last you longer and won't give you a headache to make sure it's in reasonable condition, a 3DS will give you more bang for your buck.