I think you may be referring to Perth cars instead of Fremantle. Perth 33 was built by Brush Company in 1903 and withdrawn in 1952. The five Brush bogies were classed as F and had numbers 31-34.
Perth G class 38 started life as Kalgoorlie 19 in 1902 and was transferred to Perth in 1903. This tram was built by J.G. Brill Company. The five G class numbered 35-39 were Kalgoorlie 16-20.
No F has been preserved but G35 is at PETS along with Kalgoorlie 25, another Brill bogie. Loftus have Kalgoorlie 22.