First post / an intro and two questions

This is my first post. I have a core position of low cost miners established about a year ago and I am trading some to (albeit a smaller amount). The core has GG, AUY, NEM, EGO and GDXJ, the trading allocation is devoted to GG and AUY. These have grown maybe 30% over the last year. I don't have any physical (yet).

Question… Thanks to the good folks here I have avoided GLD. Most of my $$ is in a 401(k), which I manage via TD Ameritrade. I have extra cash in my 401(k) due to trading the above (nice problem!). I have never bought physical, how can I acquire bullion (or whatever) in my 401(k)?

Also, is this the proper place to post this, or should I use comments to Turd’s articles?

Thanks in advance!