Answer: Thank you for asking. Monrovia is a wholesale only nursery and does not sell retail by mail order or catalog. So you would need to check directly with your local independent retailer that carries Monrovia (and other) products and see if they have these or could obtain them for you. Your local nursery may have some container citrus trees such as Calamondin oranges; these do well in containers as patio plants in summer and indoors in the winter. I do not think they would carry olive trees but you would need to check with them and see. There is a zip code dealer locator at the Monrovia web site to help with contact information. Larger garden centers or nurseries in urban areas are more likely to carry a wide selection of plants, so you may want to check regionally as well.
As far as other sources, you might try mail order. Logee's and Raintree for example offer both citrus and olive (Olea europaea). Listed in no particular order:
Best of luck with your search!
Q&A Library Searching Tips