How can I spend<$166 on 1769-RTB40DIO Allen-Bradley replacement terminal connectors?

How can I spend<$166 on 1769-RTB40DIO Allen-Bradley replacement terminal connectors?

I have, as a learner, an Allen Bradley CompactLogix 5370 1769-L24ER-QBFC1B controller with no terminal blocks on the face of its embedded modules.

Know of alternatives to 1769-RTB40DIO & RTB40AIO replacement terminal connectors, which are expensive? thanks!

Start here:

http://www.mouser.com/Connectors/Te...0y8sZ1z0vlpq&Keyword=phoenix+terminal&FS=True


Measure the pitch between pins and count the pins, then filter down further until you find the right one.

Mouser said, They could not help me with that part.

Is it due to the awesome AB industry/proprietary/distribution grip? *still seeking worldwide for the part(s)...

https://www.plc-city.com/shop/en/al...EAr8p6DXyNJXHnXMBc5h_7-ZdlVV15lBoClW4QAvD_BwE

http://www.plc-vip.com/sale-9186270-allen-bradley-plc-1769-rtb40dio-1769-rtb40dio.html