Nope, there's no way to run homebrew on your PSVita running firmware 3.63. Furthermore, nobody is working on hack for 3.61+ so unless you wish to wait a few years to hack your device (which you shouldn't), you have 2 options:
1) Buy a motherboard for 25-30$ that has firmware 3.60 and install that in your Vita
2) Just install ARK on your device and at least enjoy ePSP homebrew and PSP games on your Vita. Don't go past FW 3.63 if you want to do this.
You could also buy another PSVita if you can afford it.
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