That's right, see here (right down the bottom of the page)

http://home.comcast.net/~gionpeters/hhhh/pb1400.htm

... I did the same with my 1400c and its been great. The TEAC CD-224E drive was a really common model in PC notebooks of the same era; I recall ripping mine from a Toshiba Pentium 1 laptop. You shouldn't have too much trouble finding one.

JB