Great finds. Here's what I've got for you - a mix of SF-native streetwear stores and other options that hit that oversized quality tee vibe at or around $40:
SF Stores for Oversized Streetwear-Quality White Tees (~$40 or under)
1. Upper Playground
Tees run $28-$35 - well within budget. SF-born streetwear brand (over 20 years deep), known for heavyweight graphic tees with artist collaborations. Boxy, quality construction, not fast fashion. This is probably your closest match to the vibe you described.
- Has a physical SF store presence (check upperplayground.com for current location)
2. State of Flux
Located on Valencia Street (Mission District). SF-rooted brand, small-run drops, quality over hype. Tees are crafted intentionally - not mass produced. Street-credible and the store itself is part shop, part studio. Tees roughly in the $35-$48 range (some right at or just above $40, worth checking current stock).
3. San Franpsycho
Tees around $35 - oversized/relaxed cuts, heavyweight fabric, locally made SF brand with strong street identity. Has 4 SF locations:
- Inner Sunset: 1256 9th Ave (open 10am-8pm daily)
- Haight-Ashbury: 1439 Haight St (open 11am-7pm daily)
- Fisherman's Wharf: Pier 43½
- SFO Airport
- sanfranpsycho.com
4. Uniqlo (Union Square) - for blanks
If you want a premium blank oversized white tee (similar to the kind used as a canvas by quality streetwear brands), Uniqlo's heavyweight boxy tees are $15-$25 and genuinely good quality. Not a "brand" flex but the fabric/cut is solid.
5. Zara (250 Post St) - streetwear section
Zara has improved its oversized heavyweight tees noticeably. You can find boxy white tees for $20-$35, and the quality has gotten closer to mid-tier streetwear brands in recent seasons.
The One-Stop Recommendation
If you want one location that clusters the most options:
Haight-Ashbury / Upper Haight area - San Franpsycho (1439 Haight St) is there, plus the neighborhood has several independent streetwear/vintage shops within walking distance that stock oversized quality tees from smaller brands in exactly your price range. It's the most streetwear-concentrated neighborhood in SF for physical retail.
Or if you want mainstream + street in one trip: Union Square (Zara + Uniqlo + check if any streetwear pop-ups are around).
Note on "Blue Orange Bomaki" style: I'm not finding that exact brand in my search results, so I can't confirm its exact quality tier - but based on your description (oversized, streetwear-adjacent, ~$40), the brands above - especially Upper Playground and San Franpsycho - are the closest SF physical-store equivalents in quality and price.