Google Classtique Upholstery. They have a catalog page with all the different body types. For the Coupes they list a top kit. This likely includes all but the retainer strips that cover up the edges and secure the top material and the top bows if needed. If you have the original retainers, you're good to go. If not, you would either have to find some originals or fabricate something to work. The reproduction stuff is no longer in production so that could be problematic. Top wood kits are available from Ford Wood and other model A parts sources.
I assume you have a Standard Coupe but there are four different coupes that were available in 1929. Two are soft tops and two have some sheet metal and side quarter windows so top kits vary a lot.