I had a very similar situation occur a few months back when my buyers were purchasing an REO property. There were several section 1 items noted on the termite report that the lender was requiring be resolved before close of escrow, and the bank flatly refused to let us on the property.
What the listing agent finally had to do was to talk with the asset manager and to get their list of "conditions" to allow for repairs. Those conditions were:
1. The listing agent had to be present during the "entire time" that the contractor was on site making repairs
2. Only a licensed contractor would be allowed to make repairs
3. The listing agent had to pay the contractor or pay from the trust funds available to the agent
4. The buyers reimbursed the agent for the fees.
So there are definitely ways around this, but you'll need to work closely with the listing agent to get the repairs completed. The listing agent will need to work with and negotiate with the asset manager to get the conditions for repair. Most of the banks will let the buyer''s contractors (not the buyer personally) make repairs.