Your best bet is to use a mortgage broker who has access to multiple lenders. They can place your loan with a lender who will work with smaller loan amounts. 1st Priority Mortgage provides this type of service (http://www.1stprioritymortgage.com). Not only is 1st Priority based in Buffalo, but they are familiar with loans of this type.
As a former banker and current Realtor, I can give you a good local mortgage loan officer at HSBC Bank that I work with often. She will finance any mortgage amount. But I see you are in Denver, so that may not work for you.
A good mortgage loan officer should be able to help. EIther with a traditional conforming or FHA mortgage, or a home equity.