Searching a row for a substring in another table with exact match

Question

I'm trying to use search in a description to see if there is an exact match to the field in another table. I used the code from How to search a row for a substring from another table?, but this did not give an exact match.

For example I have two tables: Contract_Ref and Contract Description and the code I got from the post above generates the Actual Result because it finds the 1 first, but I want it to find an exact match.

I was wondering if I could create a while loop for the search to loop until it finds an exact match but it doesn't appear that DAX in Power Pivot supports that.

T_Contract_Ref

|Contract Number |
|:---------------|
|1               |
|100             |
|1100            |
|1110            |

T_Contracts_Description

|Description          | Desired Result| Actual Result|
|:--------------------|:--------------|:-------------|
|contract 1110        |  1110         |   1          |
|supplier contract 100|  100          |   1          |
|contract supplier 1  |  1            |   1          |

=VAR CurrentRowDescription = T_Contracts_Description[Description]
VAR MatchingRowsFromTable1 = 
FILTER(T_Contract_Ref,
SEARCH(T_Contract_Ref[Contract Number], CurrentRowDescription,1, 0) >0
)
VAR OnlyMatchingRow = SAMPLE(1,MatchingRowsFromTable1,T_Contract_Ref[Contract_Number],ASC)
Return
SELECTCOLUMNS(OnlyMatchingRow, "Budget Ref",T_Contract_Ref[Upper_Number])

Thanks in advance for any help. This is my first post so apologies if any of the formatting isn't correct.