If you are just trying to find an estimated cost to refi with a traditional lender, you can either just call a local lender and explain the situation and ask them to provide you with their customary costs or a fee sheet or see below for some ballparks of what to expect.
When it come to points and rate these will never be accurate until you are ready to lock as the rates and points will vary on a daily basis, but lenders do have standard hard costs, like underwriting/processing, doc fees, tax service, flood cert, ect. (most lender fees are around $1500-2500 plus cost of appraisal $400-650 including rent survey that will normally be required on an investment property), don't be fooled by "no cost" offers, any lender can offer this by increasing the rate to cover the closing costs, so, when shopping get both a no-cost est as well as a standard cost estimate and compare the cost to the payment savings and how long it take to re-coup the difference between the options, (ie. Cost difference = $3000 and payment difference is $30, then it takes 100 months to recoup the cost difference) sometimes it is a benefit to have the lower payment and pay fees upfront to save long term (if you plan to hold for 10 years or 120 months then the lower payment option would be $600 less over the term you plan to keep property, remember that an impound account is not a cost to include in this calc, you get this money back it is your money and just held by the lender and paid on your behalf) if you are doing short term it may be better to have a higher payment and no cost upfront.
In addition to these expenses you will have escrow and title costs associated as well, the title is usually based on loan amount but, if I was to just be estimating I would say average title and escrow cost to be about $2500 on average (not knowing the loan size, but if you are under $400K then this will be a decent estimate). Then county recording fees $100-300. Then there is the cost of taxes and insurance, insurance will usually need to be paid in full for a year unless you have more than 6 months remaining on the policy, the taxes may need to be paid if they are due within the next 2-3 months and possibly an escrow account established.
Hard costs not including points or origination fees are going to run typically $3-5K, 1 point will be 1% of the loan amount and is a pretty standard origination fee for lenders to charge, escrow account set up depends on the time of year you refi, but if you figure 12 months insurance cost and 6 months taxes you will be close.