Look up the
SO20W package and see if it's the same as what you have.
If it is, just search for a 74HCT541 at any online site you can buy from and see if they have it in this package.
I may be able to offer you a 74FCT541 in SO20W package. It's a faster version of the 74HCT541, but is likely to be compatible.
Note that the T in the 74HCT541 means the device has TTL input voltage levels. This may be important.