Try these references for the molecular weight.

(Information from BRENDA database: https://brenda-enzymes.org/enzyme.php?ecno=3.1.1.3&Suchword=&reference=&UniProtAcc=&organism%5B%5D=Sus+scrofa&show_tm=0#MOLECULAR%20WEIGHT)

Triglyceride lipase from porcine pancreas (1981), Methods Enzymol., 71, 619-627

gives a molecular weight of 50,000 based on gel filtration and ultracentrifugation.

Porcine pancreatic lipase. Complementation of the primary structure (1981), Biochim. Biophys. Acta, 71, 129-138.

gives 49,859 based on amino acid sequence

The pI and molecular weight can be calculated based on the amino acid sequence, but that does not take post-translational modifications into account.