In a feat I find to be quite novel and impressive, Jürgen Büssert has developed a program which will read data from a cassette (or WAV) and write a Model bootable disk. This will allow people with no boot disk, but who have an expansion interface, disk drive, and cassette cable, to create a boot disk! His package includes NEWDOS/80 v2.0, TRSDOS v2.3, LDOS, and MultiDOS v1.6S
You can find his web page explaining operation at Here.
Thank you, Jürgen!
P.S. If you have a Model I and need boot disks, you can so always request them here.