Trim data in cell to specific format

I have data in column A (example below).

0.894.114.695.EE9

1.274.788.355.825

K.S00.001.409.43E

They are unique product codes. They might start with digits (0,1 etc) or letters. They also contains dot, letters and digits.I need to manipulate this data to format I need i.e. from 0.894.114.695.EE9 to 0894114695 or K.S00.001.409.43E to KS00001409. Basically I have to remove last 3 characters, remove "." and keep 0 in front (if string starts with 0).

Currently to do it I follow the below steps:

1. =mid(a1,1,13) and overwrite formula (now in row B)
2. CTRL+f and replace "." with nothing
3. Then I put formula: =IF(LEN(B2)<10,0&B2,B2)

Is there a possibility of having just 1 formula, that would do all the 3 steps?

I have looked online for solution for weeks, but unfortunately I could not find one, that will work for me.Thank you in advance for all your help.