Hey Dave, Sorry I'm a little late to the party but I have three 19mm long silver screws that fit through the PU hole (they don't slide right through the hole but almost, they need to be threaded through but are small enough that they won't mess up the existing threads in the PU). I also have four 16mm and four 20mm long gold screws that slip easily right through the holes. I have lots of black or silver screws that definitely need to be screwed through the holes and will possibly mess up the existing threads in the PU holes.
You are welcome to any of these if you like. I can get them in the mail to you today. You can send me an email to dave@drberg.org with your address and let me know what you want and I'll get them off to you right away.
Thank you so much for your kind offer! I am sending an email now.