OK, there's an error there (mine), the 10R resistors are 1210. I have amended the BOM to show this.
The 10R resistors aren't in the signal path, they're in the PSU CRCRC filters, thick film are probably adequate there. I used a Panasonic part from Farnell, described as an anti-pulse or anti-surge resistor, rated 0.5W 5%. There are pads on the board for 2 in parallel so you could use 2 * 22R, The actual value is dependent on the wallwart you use (how much voltage you can afford to drop) and the dissipation (how hot they get). I've got 1 * 10R in each position, the amp should draw ~50mA quiescent which is 0.5V dropped across each, you can feel that they're above ambient but they're not hot.
R17, 18, 23 - 28, the voltage setting resistors round the regulators again don't need to be anything special, 1% is nice but I just selected some matching values from 5% thick film. I have a selection kit, 50 each of numerous values, only a few dollars from ebay. The values shown, 150R and 1k5, result in +/- 13.75V rails. You could parallel a 10u 1206 cap with the voltage-setting resistor to reduce ripple by piggy-backing it, but I found the hum inaudible once I cut the board. Similarly, the voltage dividers for the protection circuit and the switch-on delay can be thick film. This just leaves the gain-setting resistors in the amplifier proper and the integrator. I used Panasonic ERA series metal film 0.1% for this first build. These are rated low current noise, excellent non-linearity and are 27 pence here, not too bad.
All the ICs in the amp are rated +/-18V, so you can run it this hot if you feel the need and you have a suitable wallwart. I have some 16V ones. These provide ~22V after the diode drop. Lose 2V in the CRCRC filter, the LM317/337s have a dropout voltage of 2V, that would allow 100mA before the supply would begin to sag, a good compromise keeping the dissipation in the regulators from getting too high. You can see that you could get 200mA by reducing the 10Rs to 5R at the cost of some supply ripple, or go for an 18V wallwart at the cost of having the regulators run a bit hotter. You might want to bolt them to the enclosure and bring wandering leads to the board in that case.
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