I need an accountant reference letter

I'm self employment under my LLP which has only been trading for 3 months. I'm moving houses and I need a reference letter (and possible telephone call) for my letting agent confirming my gross income so far. I need this done asap so I don't lose the house. I can forwardto you my bank statements confirming the money in etc asap. Let me know if it can be done and your price asap and I will get back to you tonight as Ideally I need this completed by 4pm tomorrow 22 June 2017. Thank you Regards, Neville