It's not extremely inefficient, I just find Google Docs a lot easier because you can copy and paste the code extremely easily and also with Google Docs, you can share the spreadsheets easier with friends. I have never personally tried doing it with Excel, but someone I know has a guide for it on a separate forums. Basically what you need to do is go to the Data tab in Excel and click "From web" and then I guess you have to find where the data is on the web and it will do something similar to what Google Docs does, just find the data in HTML and extract it.
Was bored and decided to check this out. It looks like these items are already listed as drops. So either I misunderstood you, it was already updated and you didn't notice, or they already updated and forgot to post about it. So did I misunderstand you?
Since last update, I got 95 fletching, 76 herblore, and I also did a bit of a bank cleanout, sold a lot of stuff, most importantly my Bandos armor, and got surpassed my goal of 50m cash. Now I plan to use that cash to merchant and make more money.