My buyer''s lawyer has emailed my realtor and has asked of her the following we need an actual assignment of contract on a blank addendum form

Realtors generally have access to forms that they can use to create an assignment.  So long as they are filling in blanks and not giving legal advice, their broker should allow them to prepare such a form.  However, who you can assign a contract to and what the legal ramifications of that may be could be more complicated that just signing an addendum.  The general assignment form is very simple. But if there is seller financing, or association approvals, or deposits with terms, special remedies in the contract, etc., the drafting of the addendum could get complicated and then would require an attorney.  The buyer's attorney should be able to draft this pretty quickly.  You might need to have your attorney review if it contains special terms or language, or if it might affect your rights under the contract.