Search Partial Term Matching Question

First off = this is a great plugin and I love how easy it is to customize!

But I have a question about my search logic settings.
My client has a custom field with only 3 digits and they want it to still match if a user enters a 5 digit search…

For example:
Custom Field Value: 123
User Searches For: 12345
= No Results (right now)

Is there any way I can adjust the settings to get 5 digit searches to match 3 digit custom field values? I tried both Regular and Index Table with the same results. I also have exact matching turned off.

thanks for you time!