Starkeeper,
An atheist is hard to convince. There is always a remote chance that you got that two identical bikes. And myself with another S class, with same color, etc. However remote, there is a probability number to it !

Now, the flat footed person (actually several at the same time) who received new feet without reconstuctive surgery: now that is a miracle no matter how you looked at it. The possibility of that happenning by chance is ZERO. It is a supernatural event and will probably convince an atheist or skeptic to look deeper.

Starkeeper, have faith and God will do exceedingly far more than what you could ever hope or dream of. You might just get a keyboard much better than PSR1500. How about a PSR3000 or better ? God can do it especially if you have faith in Him and stay in His will for your life. It is MUCH easier to live this life with God's help than without, so we better seek His will and stick to it. You will be very useful and bring much blessing to the people around you with that arranger ! I pray that it will be done in speedy way. Let us know when (not if) and how God provides you with it.