Your search for "fittings" revealed the following:
Stainless Steel Swagelok Tube Fitting, Male Elbow, 1/2 in. Tube OD x 3/8 in. Male NPT
S$34.66
Vendor: APSS Store
View Product
Stainless Steel Swagelok Tube Fitting, Union Tee, 1/2 in. Tube OD
S$68.77
Vendor: APSS Store
View Product