CONCATENATE Use LEFT, RIGHT Or REPT

I am trying to concatenate the formula below so that the data lines up properly but I can't figure out if I use LEFT, RIGHT, LEN, REPT or what is the proper combination.

=(D12&" "&TEXT((FP12*100),0)&"% Cmpl"&" "&IF(FU12=1,FU12&" Hr Rmng",FU12&" Hrs Rmng"))

What I want to do is this.

D12 in the formula is always 13 characters, after that I want three spaces and then the next data which will be a one to three digit number (FP12 is 0 to 100) then "% Cmpl" (without the quotes), then three spaces and the next data which will be one to three digit number (FU12 is X to XXX) then a space and "Hrs Rmng".

I count that I need the data to be a max of nine total characters for the second part of the formula (100% Comp) and 12 for the third part (XXX Hrs Rmng) plus the three spaces between.

I want the data to be right justified so if the data is less than 9 or 12 character respectively, I want to add the spaces to the front/left of the data (xxxxxxxxxxxxx-----0% Cmpl-----2 Hrs Rmng).

I am guessing that I can also just increase the number of characters to be added to the front of the data by three and then I can remove the &" "& part of my formula?