I ended up buying (from Digi-key):
M5M51008DFP70HIA0-ND IC SRAM 1MBIT 70NS 32SOP
PT100KXCT-ND RES 100K OHM 1W 5% 2512 SMD
PT47KXCT-ND RES 47K OHM 1W 5% 2512 SMD
568-1379-1-ND IC GATE NAND QUAD 2INPUT 14SOIC
296-1195-1-ND IC HEX D-TYPE FLIP-FLOP 16-SOIC
What I was failing to realize was that when these companies list the modules as 1 M or 1 Mb, it stands for a mega-bit, which is equivalant to 1,000,000 bits / 8 ~ 128kB. I, for an incredibly and stupidly long time, kept thinking these were 1MB (as in mega-byte) modules. Anyway, the memory was "LL" but the datasheet did say low active and low idle power; the currents were comparable to one by Sony, listed as CXK581000AM-70LL
I picked up an extra 104 SMD resistor (the 100k ohm one) to upgrade the IR receiver.
As for the original 32kB memory chip on my HP48G, it's Winbond W242575-70LL.
Also, it appears that my PCB board has a number printed on it: NI9803 (printed slightly near the center of the board). I also see another number: I34 slightly below the CPU. I am hoping someone knows something about how to place the 104 and 143 SMD resistors as according to an upgrade doc I read, their alignments vary depending upon PCB versions.
I've upgraded an HP48G before (only to 128kB user ram) but it was stolen when I was studying abroad in Hungary. I finally bought a new 48G (for $15.00!) and decided to go for port 1 and port 2. This time around, I managed to open the case without any damage whatsoever (e.g. no cutting or removing the keyboard overlay) by popping the rivets (they're not damaged and are reusable) and slowly applying pressure to the latch points. I'll document the process and have plenty of photos in case people are interested.