Guarantor help??

I'm currently in my first year of Uni living in student accom and started thinking about my housing for next year, I've already had experience renting private as I had some housing stress before I was allocated my flat currently so I'm aware of how to handle contracts and approach viewings but I can't help but continually get stuck on my guarantor.
With my home life and family there's no option for me to turn to anyone I know for support on being my guarantor and I'm dreading the reality that I will probably have to go private in doing so - if so, how do you handle it? Financially, I do not have the funds to pay the rent of my current housing let alone private rent and my family are limited and too stretched for me to fall back on without feeling like a terrible daughter.

Is there any website or service that can help me to finance this next year? Is there any particular companies that have cheaper guarantor services?